首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   11396篇
  免费   330篇
各国政治   587篇
工人农民   451篇
世界政治   734篇
外交国际关系   430篇
法律   7196篇
中国政治   82篇
政治理论   2179篇
综合类   67篇
  2020年   133篇
  2019年   163篇
  2018年   208篇
  2017年   250篇
  2016年   249篇
  2015年   182篇
  2014年   228篇
  2013年   1187篇
  2012年   248篇
  2011年   274篇
  2010年   235篇
  2009年   239篇
  2008年   303篇
  2007年   292篇
  2006年   311篇
  2005年   253篇
  2004年   252篇
  2003年   273篇
  2002年   238篇
  2001年   452篇
  2000年   361篇
  1999年   339篇
  1998年   140篇
  1997年   129篇
  1996年   112篇
  1995年   121篇
  1994年   128篇
  1993年   130篇
  1992年   210篇
  1991年   249篇
  1990年   234篇
  1989年   205篇
  1988年   227篇
  1987年   245篇
  1986年   263篇
  1985年   263篇
  1984年   223篇
  1983年   204篇
  1982年   125篇
  1981年   128篇
  1980年   92篇
  1979年   164篇
  1978年   121篇
  1977年   100篇
  1976年   76篇
  1975年   113篇
  1974年   130篇
  1973年   107篇
  1972年   82篇
  1971年   89篇
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
231.
232.
233.
The environment facing hospitals, generally supportive until the 1970s, may now be characterized as complex, turbulent, and constrained. In response to such environmental conditions, hospitals have adopted new strategies and structures. The strategies, described as corporate rationalization, have led away from the traditional structure of freestanding, autonomous hospitals and toward the formation of multi-institutional systems. These systems are designed to provide sufficient strength to cope with the environment, to acquire scarce and valued resources, to allow organizational stability, to achieve organizational purpose, to enable growth and/or survival, and to enhance market position. The impact of multi-hospital systems is viewed in two major areas: acquisition, retention, and utilization of economic and human resources, and organizational, political, and social factors.  相似文献   
234.
235.
Morganthau T  Coppola V  Carey J  Cooper N 《Newsweek》1983,102(6):30-6, 39-40
  相似文献   
236.
INTRODUCTORY GUIDE TO MIDDLE EASTERN AND ISLAMIC BIBLIOGRAPHY. (Middle East Libraries Committee Research Guides, 5.) Edited by PAUL AUCHTERLONIE. Oxford, Middle East Libraries Committee, 1990. v, 84pp. £9.50.

SUFI WOMEN. By JAVAD NURBAKHSH. Translated by L. Lewisohn. Rev. ed., London & New York, Khaniqahi‐Nimatullahi Publications, 1990. 263pp. 8 illustrations. £7.95.

WHO'S WHO IN THE ARAB WORLD 1990–1991. Tenth edition, thoroughly revised and completed. München, New York, London, Paris, K.G. Saur, for Publitec Publications, 1990. 927 pp. £180.00

INVENTARIO DE FOLLETOS: SECCIÓN DE ÁFRICA Y MUNDO ÁRABE DE LA BIBLIOTECA NACIONAL, I (CAJAS 7000 A 7021). By JAVIER GÓMEZ LÓPEZ & others. Madrid, Biblioteca Nacional, 1989. 124pp.

BIBLIOGRAFIA DE LA LITERATURA HISPANO‐ARABE. Compiled by MARIA JESUS RUBIERA MATA. Alicante, Universidad de Alicante, 1988. 75pp. Ptas. 566.‐

ESTUDIOS ONOMÁSTICO‐BIOGRÁFICOS DE AL‐ANDALUS, I. Edited by MANUELA MARlN. Madrid, CSIC, Instituto de Filología, Departamento de Estudio Árabes, 1988. 610,[2]pp.

ESTUDIOS ONOMÁSTICO‐BIOGRÁFICOS DE AL‐ANDALUS, II. Edited by MARlA LUISA ÁVILA. Granada, CSIC, Escuela de Estudios Árabes, 1989. 342,[2]pp.

AL‐ADAB AL‐TÜNISI AL‐MU'ASIR. By JEAN FONTAINE. Tunis, al‐Dar al‐Tūnisiyya li‐1‐Nashr, 1989. 191pp. TD3.200.

ENGLISH‐PERSIAN DICTIONARY OF LEGAL AND COMMERCIAL TERMS. Compiled By K.FAHIM, J. HABIBION and F. VITTOR. Leiden, Brill, 1989. 81pp. Hfl 150.

FLORA OF EASTERN SAUDI ARABIA. By JAMES P. MANDAVILLE. London, Kegan Paul International, in association with the National Commission for Wild Life Conservation and Development, Riyadh, 1990. x, 482pp. 200 colour ills. £95.00.  相似文献   

237.
Reviews     
Terry L. Thompson & Richard Sheldon, eds, Soviet Society and Culture: Essays in Honor of Vera S. Dunham. Boulder, CO: Westview Press, 1988, xiii+290 pp., £21.00.

Michael Rywkin, Soviet Society Today. New York: M.E. Sharpe, 1989, xii+243 pp., $35.00 h/b, $12.50 p/b.

David Lane, Soviet Society Under Perestroika, London: Unwin Hyman, 1990, xv+401 pp., £40.00 h/b, £12.95 p/b.

Catherine Merridale, Moscow Politics and the Rise of Stalin: The Communist Party in the Capital, 1925–32. London: Macmillan, 1990, xv+328 pp., £47.50.

Roger Pethybridge, One Step Backwards, Two Steps Forward: Soviet Society and Politics under the New Economic Policy. Oxford: Clarendon Press, 1990, xi+453 pp., £48.00.

Francois Heisbourg, ed., The Strategic Implications of Change in the Soviet Union. London: Macmillan, 1990, vi+227pp., £40.00.

Neil Fodor, The Warsaw Treaty Organisation: a Political and Organizational Analysis. London: Macmillan, 1990, 235 pp., £40.00.

Gerald Segal, The Soviet Union and the Pacific. Boston, MA: Unwin Hyman, 1990, xiii+236 pp., £30.00 h/b, £10.95 p/b.

Philip S. Gillette & Willard C. Frank, Jr, eds, The Sources of Soviet Naval Conduct. Lexington, IN: Lexington Books, 1990, xvii+297 pp., $39.95.

Sylvia Woodby & Alfred B. Evans, Jr, eds, Restructuring Soviet Ideology: Gorbachev's New Thinking. Boulder, CO: Westview Press, 1990, 226 pp., £22.50.

Nikolai N. Petro, ed., Christianity and Russian Culture in Soviet Society. Boulder, CO: Westview Press, 1990, xi+244pp., £17.95 p/b.

David A. Dyker, Yugoslavia: Socialism, Development and Debt. London: Routledge, 1990, xi+201 pp., £30.00.

Agnes Heller & Ferenc Fehér, From Yalta to Glasnost. The Dismantling of Stalin's Empire. Oxford: Basil Blackwell, 1990, viii+288 pp., £35.00.

Elemer Hankiss, East European Alternatives. Oxford: Clarendon Press, 1990, xiv+319 pp., £35.00.

George Blazyca & Ryszard Rapacki, eds, Poland into the 1990s: Economy and Society in Transition. London: Pinter, 1991, x+148 pp., £27.50.

Michael D. Kennedy, Professionals, Power and Solidarity in Poland: A Critical Sociology of Soviet‐Type Society. Cambridge: Cambridge University Press, 1991, xiv+421 pp., £45.00, $59.50.

Graham Smith, ed., The Nationalities Question in the Soviet Union. London: Longman, 1990, x+389 pp., £22.50 h/b, £12.95 p/b.

James Muckle, Portrait of Soviet School under Glasnost. Basingstoke: Macmillan Press, 1990, ix+205 pp., £35.00.

Piers Beirne, ed., Revolution in Law: Contributions to the Development of Soviet Legal Theory, 1917–1938. Armonk, NY: M. E. Sharpe, 1990, xiii+202 pp., $49.95.

Richard M. Connaughton, The Republic of the Ushakovka: Admiral Kolchak and the Allied Intervention in Siberia, 1918–20. London: Routledge, 1990, ix+193 pp., £30.00.

Vitaut Kipel & Zora Kipel, eds, Byelorussian StatehoodReader and Bibliography. New York: Byelorussian Institute of Arts and Sciences, 1988, 398 pp.  相似文献   

238.
Deoxyribonucleic acid (DNA) was isolated from a number of spongy and compact human bone tissue specimens, and the yield was estimated on a "per milligram of starting tissue" basis. DNA was, in addition, isolated from a number of corresponding blood and bone tissue specimens. Spectrophotofluorometry and ethidium bromide visualization on minigels were used to estimate the quantity and degree of degradation of DNA. The DNA from several blood-bone pairs is shown to give concordant restriction fragment length polymorphism (RFLP) typing results by two different typing protocols with five different single-locus probes. DNA from several additional blood-bone pairs is shown to give concordant results for human leucocyte antigen (HLA)-DQ alpha phenotypes following polymerase chain reaction (PCR) amplification and hybridization to specific allele-specific oligonucleotide (ASO) probes, and for the variable numbers of tandem repeats (VNTR) length polymorphisms 3' to the human apolipoprotein B (APOB) gene following PCR amplification with specific primers and analysis of the products by electrophoresis and ethidium bromide visualization.  相似文献   
239.
Narcotics "body packing" can be detected in abdominal X-rays by the ring shadow caused by air trapped in the packs. In a series of 82 cases admitted for abdominal X-ray in Helsinki, Finland, in 1982 through 1988, we encountered 9 (11.0%) true positives, 3 (3.6%) false positives, and 1 (1.2%) false negative. The false positives were due to the constipation often associated with the narcotics abuse. The false negative X-ray diagnosis was attributable to an inexperienced radiologist. False negatives may also be associated with packets containing marijuana, packs with few wrappings, aluminum-foil coated packs, and machine-packed narcotics. Searching for trapped air in radiographs, repeated X-raying by an experienced radiologist, use of computed tomography, or combined urinary drug screening may be applied to diminish false findings and to avoid unnecessary arrest for the purpose of fecal screening over several days.  相似文献   
240.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号